Turbocompressors increase efficiency for wastewater applications

Sulzer has extended its highly popular HST 30 range of turbocompressors with the addition of two new models. 

The HST 30-58-8 and HST 30-38-2 offer increased flow and pressure respectively for applications in the wastewater industry.

Together with a new, larger motor, the HST 30 range offers a cost-effective, efficient and reliable solution for aeration applications.

There are countless designs for aeration tanks and membrane bioreactors that each have their own requirements in terms of air supply. 

The size and depth of the tank will often define the specifications for the turbocompressor; traditional, shallower designs can utilise greater airflows while deeper tanks require high pressures of air.

For wastewater treatment plants aiming to upgrade their aeration facilities but retain shallower tanks, the HST 30-58-8 offers improved efficiency at lower pressures up to 75kPa (10.5psig) with an extended flow envelope up to 15,000 Nm3/h (9,400 SCFM). This model is also well-suited to the task of scouring membranes in membrane bioreactors (MBRs).

For some sites, both old and new-build, space constraints can mean that aeration tanks are deeper, with a smaller surface area. In these cases, the turbocompressor needs to deliver a higher pressure to ensure an efficient process. 

For these applications, the HST 30-38-2 offers increased operating pressures up to 130kPa (18.9psig); the flow is correspondingly lower at 10,00 Nm3/h (6,500SCFM).

The HST 30 range has also benefitted from a new 350kW (450hp) electric motor which will be fitted to the top-of-the-range models. This offers greater flow rates and peak operating pressures with the HST 30-46 performance being boosted to 12,400 Nm3/h (7,900SCFM). 

As with all of Sulzer’s turbocompressors, the entire unit, including the electric motor and electronic controls are all designed and manufactured in-house.